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| Range categories | Area (km2) | % Of historical extent | # Of patches |
|---|---|---|---|
| Extant | 8,510,500 | 25 | 173 |
| Possibly present | 738,000 | 2 | 64 |
| Possibly extinct | 3,528,700 | 10 | 52 |
| Extinct | 21,891,900 | 63 | – |
| Grand total | 34,669,100 | 100 | – |
